<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <!-- <style>
        ol li,ul>#world {
            color: brown;
        }

    </style> -->

    <!-- <style>
        div {
            color:red;
        }

        div:hover {
            color:blue;
        }

        div:active {
            color: blueviolet;
        }
    </style> -->

    <style>

        div{
            height:500px;
            background-color: tomato;
            border-radius:20px;
            /* background-repeat:repeat; */
            /* background-image:url(123.jpg); */
            /* background-repeat:no-repeat;
            background-position:right bottom; */
        }

        div {
            line-height:100px;
        }

        div {
            text-indent:100px;
        }

        /* div {
            text-decoration:none;
        } */

        /* div {
            text-align: center;
        } */

        div {
            color:#FF0000;
            font-size:50px;
            font-weight:700;
            font-family:'宋体';
        }
    </style>

</head>
<body>

    <div>Hello World</div>
    
    
    <br>


    <ul>
        <li id="world">123</li>
        <li>456</li>
        <li>789</li>
        <li>111</li>
    </ul>

    <ol>
        <li class="one"><a href="#">123</a></li>
        <li class="one">456</li>
        <li>789</li>
        <li>111</li>
    </ol>

    

</body>
</html>